Drill-bit



P. W. SMITH, 1.1. BOUKHUUT AND E. W. MONCE.

DRML 8H.

APPLICAHGN Hm .MY :0. 1920.

Patented Jim. 11, 1921.

. 1 T TORNEY UNITED sings PATENT OFFICE.

numus w. SMITH, or wnmgon orrir, KANSAS. AND JOHN J. BOOKHOU'I. AND

EDWIN. I. MONCE,

OF DALL AS, TEXAS.

DRILL-BIT.

To all whom it may concern:

Be it known that we, PRIMUS W. Snrrrr, residing at Junction City. in the county of (lcarv and State of Kansas, and Jmnx J. .looxiuorr and l lnwm \V. lllonon, residing at Dallas, in the county of Dallas and bitatc oi Texas, citizens of the l nitcd States, have iuvcntcd curtain new and useful Improvements in Drill-Bits, of which the following is a specification.

Our invention has relation to an improve" mcnt in drilling hits and in such connection it relates more particularly to the arrangement and construction of such a drilling hit.

The principal object of the. invention is to provide a means whereby the driller may at all times have advamc knowledge of the formation into which he about to extend his main hole; it being our purpose, by the use of a smaller devicc extended below the main drillin hlades at any; depth desired to find the desired formation with smaller diameter hole and being able to stop at any time with desirable ledge or footing below the drill blades on which casing may rest, thereby avoiding the usu'al trouble experienced of drilling into oil sand with main bit with no provision for casing seat.

Our invention will be more fully understood by reference to the accompanying drawings forming part hereof, in which- Figure 1 illustrates a type of assembly of any standard drilling tool equipment, embodying our manner of attaching by means of threaded connection which may he either tapered or straight.

Fig. 2 is a. cross sectional view taken on line 2-2 of Fig. 1.

Fig. 3 is a cross sectional view of Fig. 1 taken on line 3-3 thereof.

Figs. 4, 5, 6 and 7 are detail eotiye views respectively of the drilling hides, showing the cutting edges.

Referring more particularly to the draw-- ings, 7 denotes the head of the device into the center of which is projcctcd a threaded connection to receive. extension of any standard drilling tool of lesser dimensions than this device and from which extends one or Bpefiification of Letters Patent.

invention, and showing the Patentodifnn. 11, 1921.

Application filed May 10. 1920. serial No. amass.

more drilling points or blades 5, so spaced and dimensioned as to permit the connection of any standard drilling device. Extending above the head 7 is a suitable conncction 8 which may be either tapered or straight, internal or external for connecting to main drill stem. and may he of any size required to meet resistance. 10 indicates opening and channels through which water is forced to exhaust through opening 6 which is designed to flush the front or cutting edge of hit thereby keeping a clean surface in front of hit when used on rotary machines. 9 indicates a channel and openings through which water is forced to lower drilling bit to exhaust at 2, when using rotary machine. 12, 14 and 15 are some types of blades which may he used with this class of drilling bit, it being our purpose to use any angle or shape in cutting best designed to successfully negotiate any formation in which We. may be working. 7 is a pa of detachable drill bit which is secure to the sides of the drill head and held in position by means of stud screws and keys.

Having thus described the nature and ob jects of our invention, what we claim as new and desire to secure by Letters Patent,is: A rotary drilling tool of the character described, comprising a head with drilling blades (lctachably secured to the head, channels through said head for circulation of water for cleaning the cutting ed es of blades, and a drill stcm adapted to e carried below said head and carrying a bit- 0 smallcr dimensions and diameter than the main drill bit, thecutting edges of the upper drilling blades arranged equally distant from the center or axis. of rotation-of the drill stem, the drill stem bit being of such length so as to afford a means f lndicatin the nature of the formations tl'ligugh whic the hit is working and I the formed to allow the water to carry the cuttinr s therepast.

I n testimony whereof we have signed our names to this s we ification.

PRIMUS W. SMITH.

JOHN J. BOOKHOUT. EDWIN 'WL MONCE.

and being all 

